Re: [Boost-users] [function] vs2005 warning

From: Doug Gregor (dgregor_at_[hidden])
Date: 2006-10-13 10:29:57

On Oct 10, 2006, at 8:39 PM, Michael Marcin wrote:

> Peter Dimov wrote:
>> Michael Marcin wrote:
>>> Hi,
>>>
>>> I'm using a few day old RC_1_34_0 from cvs.
>>>
>>> In boost\function\function_base.hpp I get a warning message that is
>>> quite annoying so I went in to remove it.
>>>
>>> The thing is I don't understand what it is complaining about.
>>> It gives this warning message:
>>>
>>> boost/function/function_base.hpp(287) : warning C4189: 'out_functor'
>>> : local variable is initialized but not referenced
>>>
>>>
>>> But the code is:
>>>
>>> functor_type* out_functor =
>>>               reinterpret_cast<functor_type*>(&out_buffer.data);
>>>    // Some compilers (Borland, vc6, ...) are unhappy with
>>> ~functor_type. out_functor->~Functor();
>>>
>>> which looks a lot like it is referencing out_functor to me.. can  
>>> this
>>> warning be disabled
>>
>> I think that changing to
>>
>> reinterpret_cast<functor_type*>(&out_buffer.data)->~Functor();
>>
>> can fix it.
>
> Yes that removes the warning it'd be great if that could be patched  
> into
> RC_1_34_0 & HEAD.

Committed to both. If it causes any problems on RC_1_34_0, I'll back  
out this patch and using a #pragma warning disable instead.

        Doug